57 lines
1.7 KiB
C
57 lines
1.7 KiB
C
/***
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This file is part of systemd.
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Copyright (C) 2014 Axis Communications AB. All rights reserved.
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systemd is free software; you can redistribute it and/or modify it
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under the terms of the GNU Lesser General Public License as published by
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the Free Software Foundation; either version 2.1 of the License, or
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(at your option) any later version.
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systemd is distributed in the hope that it will be useful, but
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WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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Lesser General Public License for more details.
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You should have received a copy of the GNU Lesser General Public License
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along with systemd; If not, see <http://www.gnu.org/licenses/>.
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***/
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#include "util.h"
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#include "ipv4ll-internal.h"
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int arp_network_send_raw_socket(int fd, const union sockaddr_union *link,
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const struct ether_arp *arp) {
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assert(arp);
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assert(link);
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assert(fd >= 0);
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if (sendto(fd, arp, sizeof(struct ether_arp), 0, &link->sa, sizeof(link->ll)) < 0)
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return -errno;
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return 0;
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}
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int arp_network_bind_raw_socket(int index, union sockaddr_union *link) {
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int s;
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assert(index > 0);
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assert(link);
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s = socket(PF_PACKET, SOCK_DGRAM | SOCK_CLOEXEC | SOCK_NONBLOCK, htons(ETH_P_ARP));
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if (s < 0)
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return -errno;
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link->ll.sll_family = AF_PACKET;
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link->ll.sll_ifindex = index;
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link->ll.sll_protocol = htons(ETH_P_ARP);
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link->ll.sll_halen = ETH_ALEN;
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if (bind(s, &link->sa, sizeof(link->ll)) < 0) {
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close_nointr_nofail(s);
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return -errno;
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}
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return s;
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}
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